Experts consider high serum cholesterol levels to be associated with
Experts consider high serum cholesterol levels to be associated with an increased incidence of coronary heart disease. Suppose that the natural logarithm of cholesterol levels for males in a given age bracket is normally distributed with a mean of 5.35 and a standard deviation of .12.
a. What percentage of the males in this age bracket could be expected to have a serum cholesterol level greater than 250 mg/ ml, the upper limit of the clinical normal range?
b. What percentage of the males could be expected to have serum cholesterol levels within the clinical normal range of 150–250 mg/ ml?
c. What percentage of the adult males in this age bracket could be expected to have a very risky cholesterol level— that is, above 300 mg/ ml?
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